#ifndef __winlinux_unzip__
#define __winlinux_unzip__

#ifdef LINUX
	#include <time.h>
	#define DECLARE_HANDLE(name) struct name##__{int unused;};typedef struct name##__*name
	#ifndef MAX_PATH
		#define MAX_PATH 1024
	#endif
	typedef unsigned int UINT;
	typedef unsigned short WORD;
	typedef unsigned char BYTE;
	typedef unsigned long DWORD;
	typedef char TCHAR;
	typedef FILE* HANDLE;
	typedef time_t FILETIME;
#endif
// UNZIPPING functions -- for unzipping.
// This file is a repackaged form of extracts from the zlib code available
// at www.gzip.org/zlib, by Jean-Loup Gailly and Mark Adler. The original
// copyright notice may be found in unzip.cpp. The repackaging was done
// by Lucian Wischik to simplify and extend its use in Windows/C++. Also
// encryption and unicode filenames have been added.

#ifndef __winlinux_zip__
	DECLARE_HANDLE(HZIP);
#endif
// An HZIP identifies a zip file that has been opened

typedef DWORD ZRESULT;
// return codes from any of the zip functions. Listed later.

typedef struct
{
	int	index;					// index of this file within the zip
	TCHAR	name[MAX_PATH];		// filename within the zip
	DWORD	attr;				// attributes, as in GetFileAttributes.
	FILETIME atime,ctime,mtime;	// access, create, modify filetimes
	long	comp_size;			// sizes of item, compressed and uncompressed. These
	long	unc_size;			// may be -1 if not yet known (e.g. being streamed in)
}ZIPENTRY;

HZIP OpenZip(const TCHAR*fn,const char*password);
HZIP OpenZip(void*z,UINT len,const char*password);
HZIP OpenZipHandle(HANDLE h, const char*password);
// OpenZip - opens a zip file and returns a handle with which you can
// subsequently examine its contents. You can open a zip file from:
// from a pipe:             OpenZipHandle(hpipe_read,0);
// from a file (by handle): OpenZipHandle(hfile,0);
// from a file (by name):   OpenZip("c:\\test.zip","password");
// from a memory block:     OpenZip(bufstart, buflen,0);
// If the file is opened through a pipe, then items may only be
// accessed in increasing order, and an item may only be unzipped once,
// although GetZipItem can be called immediately before and after unzipping
// it. If it's opened in any other way, then full random access is possible.
// Note: pipe input is not yet implemented.
// Note: zip passwords are ascii, not unicode.
// Note: for windows-ce, you cannot close the handle until after CloseZip.
// but for real windows, the zip makes its own copy of your handle, so you
// can close yours anytime.

ZRESULT GetZipItem(HZIP hz,int index,ZIPENTRY*ze);
// GetZipItem - call this to get information about an item in the zip.
// If index is -1 and the file wasn't opened through a pipe,
// then it returns information about the whole zipfile
// (and in particular ze.index returns the number of index items).
// Note: the item might be a directory (ze.attr & FILE_ATTRIBUTE_DIRECTORY)
// See below for notes on what happens when you unzip such an item.
// Note: if you are opening the zip through a pipe, then random access
// is not possible and GetZipItem(-1) fails and you can't discover the number
// of items except by calling GetZipItem on each one of them in turn,
// starting at 0, until eventually the call fails. Also, in the event that
// you are opening through a pipe and the zip was itself created into a pipe,
// then then comp_size and sometimes unc_size as well may not be known until
// after the item has been unzipped.

ZRESULT FindZipItem(HZIP hz,const TCHAR*name,bool ic,int*index,ZIPENTRY*ze);
// FindZipItem - finds an item by name. ic means 'insensitive to case'.
// It returns the index of the item, and returns information about it.
// If nothing was found, then index is set to -1 and the function returns
// an error code.

ZRESULT UnzipItem(HZIP hz,int index,const TCHAR*fn);
ZRESULT UnzipItem(HZIP hz,int index,void*z,UINT len);
ZRESULT UnzipItemHandle(HZIP hz,int index,HANDLE h);
// UnzipItem - given an index to an item, unzips it. You can unzip to:
// to a pipe:             UnzipItemHandle(hz,i, hpipe_write);
// to a file (by handle): UnzipItemHandle(hz,i, hfile);
// to a file (by name):   UnzipItem(hz,i, ze.name);
// to a memory block:     UnzipItem(hz,i, buf,buflen);
// In the final case, if the buffer isn't large enough to hold it all,
// then the return code indicates that more is yet to come. If it was
// large enough, and you want to know precisely how big, GetZipItem.
// Note: zip files are normally stored with relative pathnames. If you
// unzip with ZIP_FILENAME a relative pathname then the item gets created
// relative to the current directory - it first ensures that all necessary
// subdirectories have been created. Also, the item may itself be a directory.
// If you unzip a directory with ZIP_FILENAME, then the directory gets created.
// If you unzip it to a handle or a memory block, then nothing gets created
// and it emits 0 bytes.
ZRESULT SetUnzipBaseDir(HZIP hz,const TCHAR*dir);
// if unzipping to a filename, and it's a relative filename, then it will be relative to here.
// (defaults to current-directory).


ZRESULT CloseZip(HZIP hz);
// CloseZip - the zip handle must be closed with this function.

UINT FormatZipMessage(ZRESULT code,TCHAR*buf,UINT len);
// FormatZipMessage - given an error code, formats it as a string.
// It returns the length of the error message. If buf/len points
// to a real buffer, then it also writes as much as possible into there.

// These are the result codes:
#define	ZR_OK			0x00000000		// nb. the pseudo-code zr-recent is never returned,
#define ZR_RECENT		0x00000001		// but can be passed to FormatZipMessage.
// The following come from general system stuff (e.g. files not openable)
#define ZR_GENMASK		0x0000FF00
#define ZR_NODUPH		0x00000100		// couldn't duplicate the handle
#define ZR_NOFILE		0x00000200		// couldn't create/open the file
#define ZR_NOALLOC		0x00000300		// failed to allocate some resource
#define ZR_WRITE		0x00000400		// a general error writing to the file
#define ZR_NOTFOUND		0x00000500		// couldn't find that file in the zip
#define ZR_MORE			0x00000600		// there's still more data to be unzipped
#define ZR_CORRUPT		0x00000700		// the zipfile is corrupt or not a zipfile
#define ZR_READ			0x00000800		// a general error reading the file
#define ZR_PASSWORD		0x00001000		// we didn't get the right password to unzip the file
// The following come from mistakes on the part of the caller
#define ZR_CALLERMASK	0x00FF0000
#define ZR_ARGS			0x00010000		// general mistake with the arguments
#define ZR_NOTMMAP		0x00020000		// tried to ZipGetMemory, but that only works on mmap zipfiles, which yours wasn't
#define ZR_MEMSIZE		0x00030000		// the memory size is too small
#define ZR_FAILED		0x00040000		// the thing was already failed when you called this function
#define ZR_ENDED		0x00050000		// the zip creation has already been closed
#define ZR_MISSIZE		0x00060000		// the indicated input file size turned out mistaken
#define ZR_PARTIALUNZ	0x00070000		// the file had already been partially unzipped
#define ZR_ZMODE		0x00080000		// tried to mix creating/opening a zip 
// The following come from bugs within the zip library itself
#define ZR_BUGMASK		0xFF000000
#define ZR_NOTINITED	0x01000000		// initialisation didn't work
#define ZR_SEEK			0x02000000		// trying to seek in an unseekable file
#define ZR_NOCHANGE		0x04000000		// changed its mind on storage, but not allowed
#define ZR_FLATE		0x05000000		// an internal error in the de/inflation code

// e.g.
//
// SetCurrentDirectory("c:\\docs\\stuff");
// HZIP hz = OpenZip("c:\\stuff.zip",0);
// ZIPENTRY ze; GetZipItem(hz,-1,&ze); int numitems=ze.index;
// for (int i=0; i<numitems; i++)
// { GetZipItem(hz,i,&ze);
//   UnzipItem(hz,i,ze.name);
// }
// CloseZip(hz);
//
//
// HRSRC hrsrc = FindResource(hInstance,MAKEINTRESOURCE(1),RT_RCDATA);
// HANDLE hglob = LoadResource(hInstance,hrsrc);
// void*zipbuf=LockResource(hglob);
// unsigned int ziplen=SizeofResource(hInstance,hrsrc);
// HZIP hz = OpenZip(zipbuf, ziplen, 0);
//   - unzip to a membuffer -
// ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",true,&i,&ze);
// char*ibuf = new char[ze.unc_size];
// UnzipItem(hz,i, ibuf, ze.unc_size);
// delete[] ibuf;
//   - unzip to a fixed membuff -
// ZIPENTRY ze; int i; FindZipItem(hz,"file.dat",true,&i,&ze);
// char ibuf[1024]; ZRESULT zr=ZR_MORE; unsigned long totsize=0;
// while (zr==ZR_MORE)
// { zr = UnzipItem(hz,i, ibuf,1024);
//   unsigned long bufsize=1024; if (zr==ZR_OK) bufsize=ze.unc_size-totsize;
//   totsize+=bufsize;
// }
//   - unzip to a pipe -
// HANDLE hwrite; HANDLE hthread=CreateWavReaderThread(&hwrite);
// int i; ZIPENTRY ze; FindZipItem(hz,"sound.wav",true,&i,&ze);
// UnzipItemHandle(hz,i, hwrite);
// CloseHandle(hwrite);
// WaitForSingleObject(hthread,INFINITE);
// CloseHandle(hwrite); CloseHandle(hthread);
//   - finished -
// CloseZip(hz);
// // note: no need to free resources obtained through Find/Load/LockResource
//
//
// SetCurrentDirectory("c:\\docs\\pipedzipstuff");
// HANDLE hread,hwrite; CreatePipe(&hread,&hwrite,0,0);
// CreateZipWriterThread(hwrite);
// HZIP hz = OpenZipHandle(hread,0);
// for (int i=0; ; i++)
// { ZIPENTRY ze;
//   ZRESULT zr=GetZipItem(hz,i,&ze); if (zr!=ZR_OK) break; // no more
//   UnzipItem(hz,i, ze.name);
// }
// CloseZip(hz);
//
//

// Now we indulge in a little skullduggery so that the code works whether
// the user has included just zip or both zip and unzip.
// Idea: if header files for both zip and unzip are present, then presumably
// the cpp files for zip and unzip are both present, so we will call
// one or the other of them based on a dynamic choice. If the header file
// for only one is present, then we will bind to that particular one.
ZRESULT CloseZipU(HZIP hz);
UINT FormatZipMessageU(ZRESULT code,TCHAR*buf,UINT len);
bool IsZipHandleU(HZIP hz);

#ifdef __winlinux_zip__
	#undef	CloseZip
	#define	CloseZip(hz) (IsZipHandleU(hz)?CloseZipU(hz):CloseZipZ(hz))
#else
	#define	CloseZip	CloseZipU
	#define	FormatZipMessage	FormatZipMessageU
#endif

#endif //__winlinux_zip__
